... B GRA,B, C; GR1,GR6; GR.A-1,GR.CChinese Standard GB 3087,GB 5310,GB 6479,GB ... 12CrMo,12Cr1MoV,15CrMo,35CrMo,10MoWVNb, etc.German Standard DIN 1629,DIN 17175Grade St 37.0,St 44.0,St 52 ... .0,St35.8,St45.8,17Mn4,15Mo3,13CrMo44British standard BS 3059-1 ... 340,STB 410,STB510,STB A12,STB A22European Standard EN 10216-1, EN 10216-2Grade P235TR1, P235GH, P265GH etc.Size OD1/8"- ...